you see a big presence of law enforcement at these. taking a look at that list, how do we truly prevent an ied attack that seemingly can happen anywhere at any time? >> it's difficult. i was out there dinner with my wife and some friend who were in from overseas on friday and they commented about how secure the country is coming into it, how much security there is. then once you get here you're able to sort of flow freely throughout. you talk about an event that is over 26 miles that you have to cover the entire route. it certainly seems that the force that was put out to protect the event should have been sufficient but you can't cover every square inch of every single 26 miles, that's a problem. heather: it's easy to make us feel very vulnerable. this report from the white house, again a policy change by the president, more attention being called to this got virtually no media attention at all. >> right. heather: but you say when you were working in the department of homeland security you talked about this. >> there were two things,